Fabrication, degradation behavior and cytotoxicity of nanostructured hardystonite and titania/hardystonite coatings on Mg alloys

被引：16

作者：

Bakhsheshi-Rad, H. R. ^{[1
,2
]}

Hamzah, E. ^{[1
]}

Kasiri-Asgarani, M. ^{[2
]}

Jabbarzare, S. ^{[2
]}

Daroonparvar, M. ^{[1
,3
]}

Najafinezhad, A. ^{[2
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Mfg & Ind Engn, Johor Baharu 81310, Johor, Malaysia

[2] Islamic Azad Univ, Najafabad Branch, Dept Mat Engn, Adv Mat Res Ctr, Najafabad, Iran

[3] Azad Univ, Roudehen Branch, Fac Engn, Dept Mat Engn, Tehran 3973188981, Iran

来源：

VACUUM | 2016年 / 129卷

关键词：

Mg alloy; Hardystonite; Titania; Corrosion behavior; Cytotoxicity; MAGNESIUM ALLOY; COMPOSITE COATINGS; CORROSION; DEPOSITION; TITANIUM;

D O I：

10.1016/j.vacuum.2016.03.021

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

In this study, nanostructured hardystonite (HT) and titania (TiO2)/hardystonite (HT) dual-layered coatings were deposited on biodegradable Mg-Ca-Zn alloy via physical vapor deposition (PVD) combined with electrophoretic deposition (EPD). Although a single layer nano-HT coating can decrease the corrosion rate from 1.68 to 1.02 mm/year, due to the presence of porosities and microcracks, the nano-HT layer cannot sufficiently protect the Mg substrate. In contrast, the corrosion resistance of nano-HT coating is further improved by using nano-TiO2 underlayer since it was a smooth, very uniform and compact layer with higher contact angle (52.30 degrees). In addition, the MTT assay showed the viability of MC3T3-E1 on the nano-HT and nano-TiO2/HT coatings. The results demonstrated that the two-step surface modification improved both corrosion resistance and the cytocompatibility of the Mg alloy, hence making it feasible for orthopedic applications. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：9 / 12

页数：4

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